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Alerts This Week
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Gentoo: 201701-70 Normal: Firewalld Auth Methods Risk Alert

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Calendar Grey January 29, 2017
Scroller Gentoo
Critical security flaw in Firewalld on Gentoo permits unauthorized access to alter firewall configurations. Immediate patching advised!
A vulnerability in Firewalld allows firewall configurations to be modified by unauthenticated users.

Summary

A flaw in Firewalld allows any locally logged in user to tamper with or change firewall settings. This is due to how Firewalld handles authentication via polkit which is not properly applied to 5 particular functions to include: addPassthrough, removePassthrough, addEntry, removeEntry, and setEntries.

Topics%20covered

Topics Covered

security advisory Gentoo authentication issue unauthenticated access configuration risk Firewalld

Resolution

All Firewalld users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=net-firewall/firewalld-0.4.3.3"

References

[ 1 ] CVE-2016-5410 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-5410

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/201701-70
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Concerns

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.

Severity: Normal
Title: Firewalld: Improper authentication methods
Date: January 29, 2017
Bugs: #591458
ID: 201701-70

Topics%20covered

Topics Covered

security advisory Gentoo authentication issue unauthenticated access configuration risk Firewalld

Synopsis

A vulnerability in Firewalld allows firewall configurations to be modified by unauthenticated users.

Background

Firewalld provides a dynamically managed firewall with support for network/firewall zones to define the trust level of network connections or interfaces.

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Affected Packages

------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-firewall/firewalld < 0.4.3.3 >= 0.4.3.3

Impact

===== A local attacker could tamper or change firewall settings leading to the additional exposure of systems to include unauthorized remote access.

Workaround

There is no known workaround at this time.